Heating plant



Jan. 5, 1,937. R. PABsT HEATNG PLANT Filed May 22, 1955 I 2 Sheets-Sheet l s, S@ S wue/wto'o mcHARD PABT 5, 1937. R PABST 2,067,063

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Patented Jan. 5, 1937 UNITED STATES PATENT OFFICE Application May 22, 1935, Serial No. 22,866 In Germany November 12, 1929 Claims.

This invention relates to heating plants, and more particularly to a Warm water heating plant adapted for use in mineral baths, skyscrapers, or the like. Y

5 An object of this invention is to provide a heating system wherein water of the desired temperature may be passed through heat exchangers which may be cutl off from the supply pipes without having the pipes freeze.

Another object of this invention is to provide a heating system wherein is relieved of any pressure necessary to force the hot water through the system, thereby permitting the use of boilers constructed of cast iron or like material.

A further object of this invention is to provide a heating system of the type whereby the heat exchanger is automatically drained of Water when the valve is turned off, while at the same time heated water is permitted to pass through the valve without entering the heat exchanger so as to prevent freezing of the valve.

A still further object of this invention is to provide in a device of this kind a plurality of closed heat exchangers or radiators together with an open tank which may be suitably filled with mineral water or the like, the water yin the tank being heated by coils connected to the heating system.

Still another object of this invention is to provide animproved type of valve structure for permitting the cutting off of the flow of Water to a heat exchanger or radiator, the valve being so constructed as to by-pass a small quantity of heated water about the valve` parts so that the valve may be freely operated thus preventing freezing ot the valve.

With the foregoing and other objects in view, the invention will be more fully described hereinafter, and will be more particularly pointed out inthe claims appended hereto.

In the drawings, wherein like symbols refer to like or corresponding parts throughout the several views,

Figure 1 is a diagrammatic view of a heating system constructed according toan embodiment of this invention.

- Figure 2 is a longitudinal section taken substantially through the center of the valve and showing the valve in closed position.

` Figure 3 is a fragmentary vertical section taken through the center of the valve and through the center of one of the radiators or heat exchanging devices.

Figure 4 is a horizontal section taken on the p5 line 5-5 of Fig. 2.

Referring to the drawings, and first to Figure 1, the numeral I0 designates generally a boiler or heating device wherein water is adapted to be heated, and this heated water is then carried by means of a pipe II to a hot water 5 supply tank I2. The tank. I2 may be disposed at a point remote from the boiler IIJ, being preferably disposed adjacent the upper portion of the building in which the heating system. is installed. l0

A pump or pressure member 22 is interposed in the hot water pipe line II, and a check valve 28 is interposed between the pump 22 and the tank I2, preferably being disposed adjacent the pump 22 so that the hot water from the tank I2 15 and Within the pipe I I will not flow back toward the boiler I0. The use of a pump at this point also eliminates any pressure of the water in the standpipe I I affecting the pressure of water in the boiler I0, and by reason of this absence of water 20 pressure in the boiler IIJ, the boiler may be constructed out of cast iron or like material.

A pipe I3 is connected to the top of the hot water tank I2, and an overflow pipe I4 is connected to the pipe I3. A hot water supply line I5 25 is connected to the bottom of the supply tank I2 and branches I6 connect heat exchangers or radiators I1 with the hot water supply line I5. 'I'he water from the radiator or heat exchangers I'I returns through pipes 29 to the return pipe 30 line I9. Combination cut-ofi, supply control and radiator drain valves I8 are interposed in the branches i6, and are also connected to the return line I9. Y

An open tank 23 has a hot water or heating 35 coil 24 disposed therein which is connected to the hot water supply line I5, and a valve 25 controls the passage of hot water through the coil 24. The coil 24 is also connected as by a pipe 26 to the return pipe line I9. 40

The return pipe line I9 has a pipe 21 connected thereto which is connected to the overow pipe I4, and the return pipe I9 drains into a tank or reservoir 20. The reservoir 20 has a pipe 2l connected thereto, and the pipe 2| is 45 connected to the lower portion of the boiler I0.

In the present instance the reservoir 20 is elevated relative to the boiler I0 so that the water from the reservoir 2i] will gravitatingly flow into the boiler II). 50

In this system the pump 22 draws hot water out of the boiler I0 and forces it upwardly toward the hot water supply tank I2, from Which point the water gravitatingly flows into the heat exchangers II. In the event the pump 22 stops 5,5

or is otherwise rendered inoperative, the hot water from the boiler I8 may freely circulate through the pipe II, thence upwardly and hori- Zontally past a check valve 3| and then into the reservoir 2l). A branch pipe open to the atmosphere, with the open end above the top of the reservoir 20 is connected to the pipe 30 to permit overow of the water as a factor of safety. This check valve 3I permits flow of water in the pipe 3U toward the reservoir 23, but prevents ow of water from the reservoir through the pipe 30 to the pump 22.

The quantity of water in the supply tank I2 is controlled by means of a float controlled switch 66 which is connected as by conductors 65 to the motor for the pump 22, it being contemplated that the pump 22 be operated by means of an electric motor or the like.

The valve I8 is so constructed that when it is in closed position the hot water from the branch I5 may flow through the valve housing into the branch 29 so that the valve housing and the operative parts thereof will be kept in a warmed condition and the liquid in the valve thereby prevented from freezing. The structure of the valve indicated generally by reference character I8 in Fig. l, is like the structure shown in Figs. 2, 3, and 4.

The valve I8 is shown in Figures 2, 3 and 4 and comprises a housing 32 provided with an inlet 33, and an outlet 34 and a boss 35 which may be connected to the lower portion of the radiator I1. This radiator I1, as is shown in Figure 3, is provided at the upper portion thereof with a vent 36 so that the water in the radiator may drain out when the valve I8 is closed.

The housing 32 is provided with an intake passage 31 extending through the boss 35 and a seat 38 is provided at one end of the passage 31 against which a valve head 39 engages. This valve head or member 39 is secured to a valve stem 49.

The housing 32 is provided with a cylinder 4 I, and a piston 42 is secured to the stem 40 between the head 39 and the inner end of the stem 49 so that the piston 42 will move in the cylinder 4I when the stem 40 is moved longitudinally of the housing 32. An adjusting sleeve 43 is threaded into the housing 32 and is provided with an axial bore through which the stem 40 extends.

I'he inner end of the sleeve 43 is adapted to engage against the piston 42 when the valve 39 is moved to open position so as to limit the opening of the valve 39. The piston 42 has a bleeder opening 44 extending therethrough at one side of the center, and water from the intake opening 33 in the housing 32 may pass through the bleeder opening 44 when the valve 39 is in closed position. A by-pass channel 45 is provided in the housing 32 which communicates through an opening 46 with the cylinder 4I, and when the piston 42 is in its uppermost position the piston 42 will close the opening 46 so that no water may pass from the intake opening and from the cylinder 4I to the channel 45.

'Ihe upper end of the stem 4I] is provided with a reduced threaded portion 41 and a threaded sleeve or nut 48 engages the threaded portion 41. 'Ihis sleeve or nut 48 is threadedly mounted in a knob or operating structure 49 and secured against rotation by means of a set screw 50. Preferably the inner end of the nut or sleeve 48 has an annular flange 5I which is engaged by an annular sleeve 52. This sleeve 52 has an enlarged or offset lower portion 53 providing a shoulder 54 on the inside thereof, and a gland member 55 engages against the shoulder 54 and is movable in the outer end of the threaded sleeve 43 so as to seal the stem 40 within the adjusting sleeve 43. The adjusting sleeve 43 is locked against turning by means of a lock nut 56. The stem 40 has a pin 63 which is slidable in a slot or keyway 64 provided in the sleeve 43 so as to prevent rotation of the stem.

The boss` 35 has an outlet passage 51 at one side of the inlet passage 31, and the outlet passage 51 communicates with the outlet 34. The quantity of water passing through the outlet channel or passage 51 is controlled by means of an adjustable valve member 58 mounted in a boss 59. An annular seat member 60' is mounted in the channel 51 in a position confronting the inner end of the Valve member 58. The bypass channel 45 communicates at its lower end with the junction between the two passages 34 and 51 which, as show-n in Figures -2 and 3, is disposed about the inner end of the valve member 53.

In the operation of the system, the water in the boiler ID is heated to the desired degree and the pump 22 operated to force the heated water through the pipe Il and into the hot water supply tank I2. The hot water in the hot water supply tank I2 will gravitatingly ow through the hot water pipe I5 and the branches I6 vto the radiators I1 when the valves I8 are open. The water after passing through the radiator I1 will return to the return pipe line I9 through the pipes 29. The return water is discharged into the reservoir 20, and from this point the water gravitatingly ows to the boiler I0.

By the use of the valve structure I8, the height of the water in the radiator may be controlled so that this radiator may be either completely filled or only partially lled. The depthof water in the radiator is controlled by adjustment of the threaded sleeve 43. This sleeve 43 'affects the opening of the valve 39 which controls the quantity of water entering the radiator I1.

As shown in Figure 3 the water may completely ll the radiator I1 as shown by line 6I, or the radiator may be only partially filled as shown by line 62.

It is obvious that various changes vand modifications may be made in the details of const`ruction and design of the above specifically described embodiment of this invention without departing from the spirit thereof, such changes *and modications being restricted only by the scope oi.' the following claims.

What is claimed is:

1. A heating system comprising a boiler having an outlet adjacent the top thereof, a hot water supply tank open to the atmosphere vand connected to the outlet of the boiler and disposed-'in an elevated position, a heat exchanging member in a plane below the supply tank, a pipe 'foonnecting the member with the supply tank,*a'con trol valve in said pipe, a return pipec'onne'cte'd to the member, a reservoir open to th'e atmosphere and disposed in a plane above the boiler and below the member, said return pipe discharging into said reservoir, a pipe connecting the reservoir with said boiler, and a pump for forcing water from the boiler to the supplyI tank.

2. A heating system comprising a boiler having an outlet adjacent the top thereof,a hot water supply tank open to the atmosphereandfvcnnected to the outlet of the boiler and disposed is ln an elevated position, means for delivering water from the boiler to the supply tank, an open tank disposed in a plane below the supply tank, a heating coil disposed in said open tank and connected at one end to said supply tank, a valve controlling the passage of water to said coil, a return pipe connected at one end to the other end of said coil, a waterreservoir open to the atmosphere and disposed in a plane below said open tank and above the boiler, said return pipe discharging into said reservoir, and a pipe connecting said reservoir with the boiler.

3. A heating system comprising a boiler having an outlet adjacent the top thereof, a hot water supply tank open to the atmosphere and connected to the outlet of the boiler and disposed in an elevated position, an open tank disposed in a plane below the supply tank and above the boiler, a heating coil in said open tank, a pipe connecting one end of the coil with said supply tank, a return pipe connected at one end to the other end of said coil, a water reservoir open to the atmosphere and disposed above the level of said boiler and below the open tank, said return pipe gravitatingly discharging into said reservoir, a pipe connecting said reservoir with said boiler, and a pump for withdrawing water from the boiler and forcing the water into the supply tank.

4. A heating system comprising a boiler having an outlet adjacent the top thereof, a hot water supply tank open to the atmosphere and connected tothe outlet of the boiler and disposed in an elevated position, a heat exchanging member disposed below the level of said supply tank, a pipe connecting the member with the tank, a control valve in said pipe, a return pipe connected at one end to said member, a water reservoir open to the atmosphere and disposed above the level of said boiler and below the level of said member, said return pipe gravitatingly discharging into said reservoir, a pipe connecting said reservoir with the lower portion of the boiler, a pump disposed in the connection between the boiler and the supply tank, and a check valve in the connection between the boiler and the supply tank.

5. A heating system comprising a boiler having an outlet adjacent the top thereof, a hot water supply tank open to the atmosphere and connected to the outlet of the boiler and disposed in an elevated position, a heat exchanging member disposed below the level of the supply tank, a pipe connecting the member with the tank, a control valve in said pipe, a return pipe connected to said control valve, said control valve including means for bypassing water from said rst pipe to said return pipe when the valve is in closed position and for draining the water from the member when the valve is in closed position, a

i water reservoir open to the atmosphere and disposed below the member and above the boiler, said return pipe discharging into said reservoir, and a pipe connecting said reservoir with the lower portion of the boiler.

RICHARD PABST. 

